90205539 has 8 divisors (see below), whose sum is σ = 120366672. Its totient is φ = 60090720.

The previous prime is 90205501. The next prime is 90205541. The reversal of 90205539 is 93550209.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90205539 - 2¹² = 90201443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90205139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6744 + ... + 15029.

It is an arithmetic number, because the mean of its divisors is an integer number (15045834).

Almost surely, 2^90205539 is an apocalyptic number.

90205539 is a deficient number, since it is larger than the sum of its proper divisors (30161133).

90205539 is a wasteful number, since it uses less digits than its factorization.

90205539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23157.

The product of its (nonzero) digits is 12150, while the sum is 33.

The square root of 90205539 is about 9497.6596590950. The cubic root of 90205539 is about 448.4813647088.

The spelling of 90205539 in words is "ninety million, two hundred five thousand, five hundred thirty-nine".